Ruby erlang fix

[shanmugapriya-tr]

Description

This PR implements and validates generic BlackDuck SCA and Polaris SAST scan logic for repositories containing Ruby, Erlang, or both. Key changes:

• Makes scan logic generic (no longer chef-server specific).
• Introduces dynamic search depth for BlackDuck to support nested Gemfile/rebar.config.
• Adds robust dependency resolution for Ruby (Bundler) and Erlang (rebar3/HEX).
• Ensures correct scan coverage for pure Ruby, pure Erlang, and mixed-language repos.
• Reverts all test-only changes (e.g., pull_request triggers, branch pinning, temporary gating) to restore production workflow gating.

Validation was performed on chef-server, a Ruby-only repo, and an Erlang-only repo. All scan results are as expected, with no regressions.

Related Issue

Addresses issues with SCA scan skipping for Ruby-Erlang repos and ensures generic, robust scan logic for all supported languages.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Chore (non-breaking change that does not add functionality or fix an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have read the CONTRIBUTING document.
• I have run the pre-merge tests locally and they pass.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• If Gemfile.lock has changed, I have used --conservative to do it and included the full output in the Description above.
• All new and existing tests passed.
• All commits have been signed-off for the Developer Certificate of Origin.